Buttonless kitchen timer

serialworld

Buttonless kitchen timer [Copy link]

      Although using a 108MH microcontroller as a timer is a bit big and insignificant, this small work also uses modules such as timer, ADC, interrupt and GPIO. The principle of the work is mainly to use the three-axis acceleration sensor to collect angle information and convert it into the required timing time, and use it to collect action information as the timer control signal. 1. Development environment: The development tool used is True STUDIO, an integrated development environment based on ARM GCC. This development environment suitable for STM32 can also be used for the development of GD32F350, but you need to modify the connection file yourself, and it seems that the startup file does not need to be modified. 2. Software process: The software process is that the ADC collects the acceleration value of the three-axis acceleration, and judges whether there is an action based on the acceleration transformation of the Z axis, which is used to start or reset the timer. At the same time, the acceleration value of the XY axis is used to calculate the inclination angle of the acceleration sensor, and the timing time is confirmed according to the inclination angle meter. When the timing time is up, the buzzer beeps to remind you. 3. Usage: If you shake the acceleration sensor in the Z axis direction with your hand, the timer will be reset or restarted. The main difficulty is the motion detection using the acceleration sensor. No complex algorithms are used here, and the ADC is used to simulate the watchdog function. The motion recognition effect is average. 4. Summary of the work: Advantages of the work: No buttons are required, and the timer can be started or stopped by shaking it; Disadvantages: There is no timing display function, and a display screen can be considered in the future. 5. Main function source code: The main function is as follows, and the source file is attached at the end of the article, int main(void) { /* system clocks configuration */ rcu_config(); nvic_config(); /* systick configuration */ systick_config(); /* GPIO configuration */ gpio_config(); /* DMA configuration */ dma_config(); /* ADC configuration */ adc_config(); /*initial other devices*/ timer_config(); gpio_config_timer(); gd_eval_com_init(EVAL_COM1); gd_eval_led_init(LED1); gd_eval_led_init(LED2); gd_eval_led_init(LED3); gd_eval_led_init(LED4); gd_eval_led_init(LED5); Led_demo(); dis_frequency(); cpu_id(); delay_1ms(5000); p_func = alarm_msg; timer_enable(TIMER1); while (1) { ap_counter++; alarm_status1 = 3; alarm_status2 = 0; alarm_status0 = alarm_run(alarm_msg); data = 0; adc_interrupt_enable(ADC_INT_WDE); // delay_1ms(10); switch (ap_status) { case 0: if (1 == data) { ap_status = 1 ; } break; case 1: if (ap_counter % 1000 == 0) { delay_1ms(10); if (0 == data) { ap_status = 2; printf("!!\r\n"); } else { ap_status = 0; } } break; case 2: alarm_status2 = 1; ap_status = 0; break; default: break; } adc_disp(); alarm_status0 == 1 && alarm_status2 == 1) { alarm_status1 = 1; } else if (alarm_status0 == 0 && alarm_status2 == 1) { alarm_status1 = 0; } switch (alarm_status1) { case 1: alarm_reset(); printf("Alarm_reset.\r\n"); break; case 0: gd_eval_led_off(LED4); delay_ 1ms(200); gd_eval_led_on(LED4); g_dmacomplete_flag = 0; delay_1ms(1000); while (g_dmacomplete_flag != 1) ; alarm_init(get_angle() * 60000 / 6); alarm_start(); printf("Alarm start.\r\n"); break; default: break; } if (alarm_status0) { print f("Counter: %d minutes\r\n",(int) alarm_get_counter() / 60000); } } } 6.The system block diagram is as follows: Demonstration video: Video Supplementary content (2018-10-1 05:36): The oled screen display function was added later.

nmg

Attached to the judges' supplementary materials:

serialworld	Can GD32 be developed with GCC?	Click to view
serialworld	GD-LINK reports an error when connecting to the GD32F350RB development board?	Click to view
serialworld	ARM GCC GD32F350RB MCU startup file and connection file sharing	Click to view
serialworld	How to download programs without IDE development environment for GD32	Click to view
serialworld	Can't use the math functions provided by the compiler after GD32F350 turns on FPU?	Click to view

serialworld

Occupy the building and use it for pictures of the works.

bqgup

I am a newbie, I want to ask a few questions. 1. The ADC collects the acceleration value of the three-axis acceleration. Is your attitude sensor MPU6050? 2. The timer can be started or stopped by shaking it. Is this timer a physical module? ?

nmg

I'm missing a demo video. Please refer to the competition selection rules: https://www.eeworld.com.cn/huodon ... 201808/index.html#5 Please follow the instructions to complete the submission of the work. Each part of the required submission has a score

serialworld

bqgup posted on 2018-9-23 08:53 OP, I am a rookie, I want to ask a few questions 1. ADC collects the acceleration value of three-axis acceleration, is your attitude sensor MPU6050? ...

1. The three-axis acceleration sensor uses ADXL335, you can check the information of this chip on the Internet. 2. The timer refers to the software timer in the program.

bqgup

serialworld published on 2018-9-24 05:58 1. The three-axis accelerometer uses ADXL335. You can check the information of this chip online. 2. The timer refers to the software timer in the program...

Thank you, this accelerometer is very good. I am a novice. Thanks for your guidance.

serialworld

Added project pictures, photos without and with oled screen.

serialworld

Demonstration video: Video

tianjiu

Not bad, support it.